I've realized that it's possible to post questions on the Stack Exchange Network using upside-down text, even though it's not search-engine friendly at all. Would it be possible to implement automatic detection and conversion of upside down text on the Stack Exchange Network, to prevent such confusing text from being posted?
How does uʍop-ǝpᴉsdn text work? is one such example of a question with upside-down text, and other examples of such questions can be found here.
I think it would be straightforward to implement an algorithm for automatic detection of upside-down text - for example, it could simply search for strings that consisted of upside-down characters, and then automatically convert them to the correctly-formatted versions.